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Old 12-13-2013, 01:19 PM   #1
DCCDPro
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Post Why DCCD maps are a thing of the past.

In the last couple of months we have received e-mails asking us
how it is that our Universal DCCD Controller does not have maps
and how the system could then operate.
Let’s first look at how a map based system works and then I will
explain how our system is so different.
Maps are basically look up tables or charts stored in a memory.
A map dccd controller fetches a number in this chart or table
every time one of the parameters change. The result of a certain
input will always be one number or outcome. The table is static
so it would not recognize how you reached that point of operation
and, if the conditions of the road change, it will not change the
outcome unless you change the entire map.
An adaptive algorithm based system, on the other hand, does not
have any maps. Rather, it looks at each case based on the inputs
and also how it has arrived at that point and directly calculates
the proper outcome fast enough to reach the optimum performance
for every situation no matter the road conditions.
This technology allows the system to intelligently search for the
best result instead of just arriving at the same outcome over and
over again regardless of how off it might be.
We always highlight the following example of why map-based systems
are not efficient and practical. Imagine you are driving on a one
mile stretch of road at 60 miles per hour and the road conditions
change from dry to wet (mud,gravel ,..) and back and meanwhile
you also hit a corner.
Do you think that, even if you assessed the road condition
accurately, you will have time to switch the maps in time while
you are driving through the curve? How much time has it taken you
to reach the system and push the buttons?
In comparison, the algorithms in DCCDPro Universal Controller have
found the optimum point of operation by examining the operational
solutions hundreds of times per second and applying them to your
DCCD transmission.
This is why maps are a thing of the past!

DCCDPro Team
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Last edited by DCCDPro; 01-02-2014 at 11:04 AM. Reason: Adding links and editorial
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Old 12-15-2013, 08:22 AM   #2
Vlad
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Is the data processing fast enough for this module to get the DCCD open in time for ABS to work properly?

The OEM gets the signal from the speed sensors, or from the ABS ECU directly, by the time this module gets the signal from the g sensor and evaluates that the ABS probably will go on, is there still time to open the DCCD?
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Old 12-15-2013, 02:20 PM   #3
DCCDPro
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Hi Vlad,

Great question. First remember that the ABS control is also a processing based system that needs to evaluate the difference between front axle wheel speed compared to the back and then if it passes a threshold, send the activation signal to valves to intermittently open and close the pressure on brake cylinders. Mean time the processor in our DCCDPro Universal Controller (v25 and higher) has sensed the deceleration directly form high precision g-sensor with it's fast response (1 millisecond), no comparison needed and has applied the proper response (cut off) to clutch plates electrically.
As you see the reaction will be much faster and would not affect ABS functionality. Our beta tests through out also confirm this.
Please let me know if you have further questions.

Kind regards,
-Jeff Reid
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Old 01-02-2014, 11:08 AM   #4
DCCDPro
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Hi,

Just want to thank you all for encouragements we are receiving on posting this article
and hopefully we will have more of these educational pieces in 2014.

Kind regards,
-Jeff Reid
DCCDPro.com
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Old 01-03-2014, 10:32 PM   #5
666stars
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Except that most controllers that are mappable have an auto mode as well. Didn't the wrc cars use programmable dccd from prodrive
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Old 01-04-2014, 11:15 AM   #6
DCCDPro
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Great question.The Auto mode in aftermarket controllers is either an average static map setting for common road conditions or a mode which allows you to switch maps rather than manually set the output (which disregards/disables all inputs,maps). When one looks closely at their specification, they are inherently static map based and that is why they ask you to switch to a specific map in non ordinary conditions. Just ask yourself, if it was not just a static map why would they even have any other map settings and ask you to switch between them.
DCCDPro Universal Controller is the only algorithm based system that does not require switching between maps to provide optimum output to DCCD mechanism.
I can't speak to WRC drivers with their unlimited resources.

Kind regards,
-Jeff
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Old 02-19-2014, 09:50 AM   #7
Subifantastic
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Great improvement to the old map system as just eliminating switching maps is quite a technical achievement and also convenient for everyday drive having first hand experience with it myself. Keep up the good work guys!
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Old 06-11-2014, 02:36 PM   #8
Vlad
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Jeff,
with the DCCD Pro, as it comes with "standard" knobs, the upgrade listed on the site, to OEM knobs, does that change anything other than the knobs and pigtails?
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Old 06-13-2014, 01:44 PM   #9
Spiider
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Hi Vlad,

Yes, the oem knob and the standard knob are interchangeable.

Kind regards,
-Jeff
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Old 06-13-2014, 04:49 PM   #10
rexworx
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I think vlad is more referring to adjustment sensitivity between the switches...
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Old 06-17-2014, 12:27 PM   #11
Spiider
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The OEM and dccdpro standard knob controls have the same sensitivity setting effect and also kick off search if changed after the system is adapted.

Kind regards,
-Jeff
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Old 06-17-2014, 12:31 PM   #12
rexworx
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Thank you Jeff!
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Old 06-20-2014, 08:10 AM   #13
Vlad
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Thank you.
One more question:
The wiring for display in Sti cluster option, which you make available, by checking that checkbox you get what?
Wires coming out of the DCCD box that already have on them the proper pins to insert them into the Sti cluster connectors?
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Old 06-20-2014, 09:15 AM   #14
rexworx
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You get wires and to figure it out yourself. Done it many times...
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Old 06-20-2014, 09:31 AM   #15
Vlad
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The figuring part is fine with me, I have the diagram.
The finding pins that suit the connector is what I'm thinking about.
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Old 06-20-2014, 11:28 AM   #16
Trae32566
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As a software engineer I have to say this is freaking awesome. It hurts my head every time I think about anything that uses tables where learning algorithms could be implemented. My question is who will eventually do this for the ECU. I know it's possible but unfortunately the hardware for current ECUs is not very powerful. Anyway, awesome work
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Old 06-22-2014, 10:51 PM   #17
Shifter Kart
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so glad I found this thread.

I have an STi Type R rally car, with the 5 speed w/ DCCD and im looking to see if I can convert my center diff into an active unit. checked out your website and I like what im seeing. only thing that the website didnt mention was for a function for the handbrake, where the diff would open when the handbrake gets pulled. does your controller have this?
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Old 06-24-2014, 05:27 AM   #18
point78
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^^^^ yup ^^^^
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Old 06-24-2014, 01:10 PM   #19
Trae32566
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Quote:
Originally Posted by Shifter Kart View Post
so glad I found this thread.

I have an STi Type R rally car, with the 5 speed w/ DCCD and im looking to see if I can convert my center diff into an active unit. checked out your website and I like what im seeing. only thing that the website didnt mention was for a function for the handbrake, where the diff would open when the handbrake gets pulled. does your controller have this?
I'd also try a car with a viscous center diff if you haven't (if a buddy gas one or something) . I did some research a few months back and a lot if people actually prefer viscous center diffs.
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Old 06-24-2014, 04:45 PM   #20
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Quote:
Originally Posted by Trae32566 View Post
I'd also try a car with a viscous center diff if you haven't (if a buddy gas one or something) . I did some research a few months back and a lot if people actually prefer viscous center diffs.
for what kind of driving?
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Old 06-25-2014, 10:01 AM   #21
rexworx
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Quote:
Originally Posted by Trae32566 View Post
As a software engineer I have to say this is freaking awesome. It hurts my head every time I think about anything that uses tables where learning algorithms could be implemented. My question is who will eventually do this for the ECU. I know it's possible but unfortunately the hardware for current ECUs is not very powerful. Anyway, awesome work
Realistically the DCCDPro isnt powerful enough either. Ask me how I know...
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Old 06-25-2014, 10:02 AM   #22
rexworx
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Quote:
Originally Posted by Shifter Kart View Post
so glad I found this thread.

I have an STi Type R rally car, with the 5 speed w/ DCCD and im looking to see if I can convert my center diff into an active unit. checked out your website and I like what im seeing. only thing that the website didnt mention was for a function for the handbrake, where the diff would open when the handbrake gets pulled. does your controller have this?

Cough MAPDCCD Cough...
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Old 06-25-2014, 10:36 AM   #23
xluben
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Quote:
Originally Posted by rexworx View Post
Cough MAPDCCD Cough...
I also prefer the MapDCCD. It does have auto mode as well. Here are some photos, and if you scroll down I have posted some thoughts on it.

http://forums.nasioc.com/forums/show...2463408&page=3
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Old 06-25-2014, 12:33 PM   #24
AFBeefcake
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Quote:
Originally Posted by Vlad View Post
The figuring part is fine with me, I have the diagram.
The finding pins that suit the connector is what I'm thinking about.
buy a used cluster harness and steal some pins out of it. That's what I did.
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Old 06-25-2014, 12:34 PM   #25
AFBeefcake
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Quote:
Originally Posted by Shifter Kart View Post
so glad I found this thread.

I have an STi Type R rally car, with the 5 speed w/ DCCD and im looking to see if I can convert my center diff into an active unit. checked out your website and I like what im seeing. only thing that the website didnt mention was for a function for the handbrake, where the diff would open when the handbrake gets pulled. does your controller have this?
Yes, I believe it does. When I installed mine there is a wire you connect to the parking brake switch.
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